Nav lights colour code
Nav light colour coding goes back to before aeroplanes existed. Aviation adopted the marine nav light code whose origin lies in antiquity. There is only one thing that is fundamental in collision avoidance, and is characterised by the acronym CBRD, which stands for "constant bearing, range decreasing". If you see an object or a light satisfying the CBRD criteria, you are going to hit it! Remember, bearing in aviation is in two planes, vertical and horizontal. If the CBRD criterion is satisfied, then the appropriate manoeuvre (reaction) is anything that changes the rate of bearing change to other than zero. Think about it, colour has no relevance to the action needed to be taken for collision avoidance. There is no correct response to a red (or green or white) light that is specified by the colour. The need to correctly name the colour of an observed nav light in order to avoid collision is a myth
AP